PMID- 8794855 OWN - NLM STAT- MEDLINE DCOM- 19961024 LR - 20240104 IS - 0021-9525 (Print) IS - 1540-8140 (Electronic) IS - 0021-9525 (Linking) VI - 134 IP - 5 DP - 1996 Sep TI - Centromere and telomere movements during early meiotic prophase of mouse and man are associated with the onset of chromosome pairing. PG - 1109-25 AB - The preconditions and early steps of meiotic chromosome pairing were studied by fluorescence in situ hybridization (FISH) with chromosome-specific DNA probes to mouse and human testis tissue sections. Premeiotic pairing of homologous chromosomes was not detected in spermatogonia of the two species. FISH with centromere- and telomere-specific DNA probes in combination with immunostaining (IS) of synaptonemal complex (SC) proteins to testis sections of prepuberal mice at days 4-12 post partum was performed to study sequentially the meiotic pairing process. Movements of centromeres and then telomeres to the nuclear envelope, and of telomeres along the nuclear envelope leading to the formation of a chromosomal bouquet were detected during mouse prophase. At the bouquet stage, pairing of a mouse chromosome-8-specific probe was observed. SC-IS and simultaneous telomere FISH revealed that axial element proteins appear as large aggregates in mouse meiocytes when telomeres are attached to the nuclear envelope. Axial element formation initiates during tight telomere clustering and transverse filament-IS indicated the initiation of synapsis during this stage. Comparison of telomere and centromere distribution patterns of mouse and human meiocytes revealed movements of centromeres and then telomeres to the nuclear envelope and subsequent bouquet formation as conserved motifs of the pairing process. Chromosome painting in human spermatogonia revealed compacted, largely mutually exclusive chromosome territories. The territories developed into long, thin threads at the onset of meiotic prophase. Based on these results a unified model of the pairing process is proposed. FAU - Scherthan, H AU - Scherthan H AD - Department of Human Genetics and Human Biology, University of Kaiserslautern, Germany. FAU - Weich, S AU - Weich S FAU - Schwegler, H AU - Schwegler H FAU - Heyting, C AU - Heyting C FAU - Harle, M AU - Harle M FAU - Cremer, T AU - Cremer T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Cell Biol JT - The Journal of cell biology JID - 0375356 SB - IM MH - Animals MH - Cell Nucleus/physiology MH - Centromere/*physiology MH - Chromosomes/physiology MH - Chromosomes, Human, Pair 1/physiology MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Meiosis/*physiology MH - Mice MH - Mice, Inbred BALB C MH - Movement MH - Nuclear Envelope/physiology MH - Prophase/*physiology MH - Spermatogonia/physiology MH - Staining and Labeling MH - Synaptonemal Complex/physiology MH - Telomere/*physiology MH - Testis/cytology/physiology PMC - PMC2120985 EDAT- 1996/09/01 00:00 MHDA- 1996/09/01 00:01 PMCR- 1997/03/01 CRDT- 1996/09/01 00:00 PHST- 1996/09/01 00:00 [pubmed] PHST- 1996/09/01 00:01 [medline] PHST- 1996/09/01 00:00 [entrez] PHST- 1997/03/01 00:00 [pmc-release] AID - 96387320 [pii] AID - 10.1083/jcb.134.5.1109 [doi] PST - ppublish SO - J Cell Biol. 1996 Sep;134(5):1109-25. doi: 10.1083/jcb.134.5.1109.